In the spring, shepherds comb the fleece just before the goats begin the shedding process, which lasts three to four weeks. One goat produces about 1/2 pound of white, gray or brown fleece. White cashmere is the rarest.The raw fiber is washed and the guard and undercoat hair are separated, so that only the undercoat remains. This process reduces the weight of the total fleece by up to 50 percent. The remaining soft undercoat then goes on to be dyed and spun.The rarity of the raw material and the hard work that goes into producing the finished result makes it truly precious; it takes fleece from about 40 goats to make a single blanket.